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/*
 * Copyright 2011 - 2015 Metamarkets Group Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.metamx.common.guava;

import com.google.common.base.Throwables;
import com.google.common.io.Closeables;

import java.io.IOException;

/**
 * A Sequence that is based entirely on the Yielder implementation.
 * 
 * This is a base class to simplify the creation of Sequences.
 */
public abstract class YieldingSequenceBase implements Sequence
{
  @Override
  public  OutType accumulate(OutType initValue, Accumulator accumulator)
  {
    Yielder yielder = toYielder(initValue, YieldingAccumulators.fromAccumulator(accumulator));

    try {
      return yielder.get();
    }
    finally {
      CloseQuietly.close(yielder);
    }
  }
}